Intelligent feeding control system for cushion rubber

Abstract

The invention provides an intelligent feeding control system for cushion rubber. The problems of deformation and discontinuous feeding of ultra-soft cushion rubber in the coiling and unwinding process are solved. The system comprises an anti-deformation trolley and an intelligent unwinding device, the anti-deformation trolley is of a high-low-position double-transmission-shaft structure, a cloth liner wheel and a material wheel are installed on the anti-deformation trolley respectively, passive guide roller sets which are arranged in a coplanar mode are combined, folding stress during rubber material conveying is eliminated, longitudinal sponge protruding strips are arranged on the surface of a composite cloth liner, and an interlayer elastic buffering space is formed; extrusion deformation and adhesion of the sizing material are avoided; the intelligent unwinding device monitors the roll diameter change of double I-shaped wheels in real time through a laser sensor, and a PLC executes closed-loop control, specifically, the frequency of a driving motor is dynamically adjusted, and the constant material unwinding linear speed is maintained; the braking torque of the magnetic powder brake is sectionally controlled based on the rolling diameter of the material wheel, and self-adaptive tension matching is achieved; the system cooperatively protects the triangular section precision of the cushion rubber from the aspects of structure and control, and the tire forming quality and the production automation level are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire manufacturing equipment, and in particular to an intelligent cushion rubber feeding control system and a control method. Background Art

[0002] Cushion rubber is a type of rubber used in tire lamination production. It is placed on the shoulder of the tire, below the tread belt layer, to assist in the smooth transition from the tread to the sidewall area. It has the function of absorbing and transferring the stress generated by the tire during rolling. This allows the tread to transition smoothly to the sidewall area, thereby avoiding fatigue damage to the shoulder rubber due to sudden changes in tire thickness.

[0003] Shoulder rubber is typically stored in rolls, where the rubber and padding are wound together into a roll and placed on a guide car or spool. Because the padding is a shaped rubber with a triangular cross-section, the vertex of the triangle is typically used as the reference for laminating the belt layer during lamination. However, due to gravity, the rolls can be squeezed between layers during storage and transfer, causing deformation of the triangular cross-section of the rubber. This creates relative slip between the rubber and padding, resulting in flattened and blurred ridges. Furthermore, traditional guide roller layouts often utilize triangular cross-section transitions, which can cause surface tensile cracks and cross-sectional angle deviations in ultra-soft padding for new energy vehicles (less than Shore A hardness 40). To prevent deformation, some companies replace the padding with thin stainless steel sheets, using the inherent rigidity of the steel to support the rubber and prevent it from squeezing against each other. This results in a significant increase in the size and weight of the material cart, which increases the area occupied by the deflection station and the overall area occupied by the equipment. At the same time, since the material cart is very heavy, the overall weight can reach 3-4 tons when carrying rubber materials, making it very inconvenient to transport materials. It can only be transported by truck or AGV, and it is also very inconvenient to change materials. The manufacturing cost of the storage cart is also greatly increased.

[0004] In traditional tire cushion unwinding systems, the diameters of the material roll and the cushioning cloth roll change in opposite directions during operation, resulting in a significant difference in their linear speeds. This speed mismatch generates harmful shear stress between the cushioning and the cloth, leading to a series of quality issues. As the diameter of the material roll decreases, the linear speed decreases if the drive frequency remains constant. However, as the diameter of the cushioning cloth reel increases, the linear speed increases at the same rotational speed. This speed difference causes excessive stretching or compression of the cushioning, manifesting as noticeable tensile deformation and wrinkling. More seriously, the characteristic triangular cross-section of the cushioning can be deformed, shifting critical reference edges and changing the vertex angle, directly impacting the accuracy of subsequent tire building processes. These defects are ultimately reflected in the quality of the finished tire's sidewall, resulting in a decrease in the pass rate of the Side Defect Detection (SDS). Traditional systems, lacking a dynamic compensation mechanism, cannot effectively coordinate the speed relationship between the two spools, a key technical bottleneck hindering tire quality improvement. Summary of the Invention

[0005] The present invention provides an automatic unwinding system for anti-deformation pad rubber, comprising an anti-deformation trolley and an intelligent unwinding device. The problems of rubber deformation and discontinuous feeding are solved through the coordinated control of the anti-deformation trolley and the intelligent unwinding device.

[0006] The anti-deformation trolley comprises:

[0007] Frame;

[0008] A first transmission shaft and a second transmission shaft are arranged parallel to the frame, and the first transmission shaft is taller than the second transmission shaft;

[0009] The material wheel of the first transmission shaft and the cloth pad wheel of the second transmission shaft are sleeved, and the ends of the first transmission shaft and the second transmission shaft are connected to the first chuck and the second chuck arranged in the same direction;

[0010] The intelligent deflection device comprises:

[0011] Lead away the frame;

[0012] The in-and-out chains installed on the frame are used to pull the trolley into place;

[0013] The driving motor and the brake respectively drive the first chuck and the second chuck connected to the trolley;

[0014] A first laser distance measuring sensor and a second laser distance measuring sensor for detecting the rolling diameters of the material wheel and the padding wheel;

[0015] The PLC controller is configured to perform the following closed-loop control:

[0016] (a) Constant Linear Speed Control Method: Based on the set feeding line speed α and the real-time roll diameter D1 of the pad roll collected by the first laser ranging sensor, the output frequency f of the drive motor is dynamically adjusted:

[0017] (b) Adaptive tension control method: Based on the real-time roll diameter D2 of the material wheel collected by the second laser ranging sensor, the braking torque instruction required by the magnetic powder brake is dynamically calculated and output.

[0018] In some embodiments, the constant linear velocity control method specifically comprises the following steps:

[0019] S1: collecting the current roll diameter D1 of the cloth pad wheel in real time through the first laser distance measuring sensor (18);

[0020] S2: preset target linear velocity α (mm / s);

[0021] S3: When the pad rubber is released and the output frequency of the drive motor inverter is A (hz), the corresponding speed is B (rpm). A reduction mechanism is provided between the drive motor and the second transmission shaft, and its reduction ratio is C.

[0022] Rated speed is

[0023] After deceleration by the mechanism: That is, when the output frequency of the inverter is Ah, the speed of the cloth wheel (5) is:

[0024] S4: Circumferential velocity of the cloth wheel (5) corresponding to the target linear velocity α (mm / s), Y is the angular velocity of the cloth wheel (5) (deg / s)

[0025]

[0026] but

[0027] x is the frequency (hz) that the inverter needs to output, and Z is the speed (r / s) corresponding to the changing coil diameter at the linear speed of C (mm / s).

[0028]

[0029] because As shown in formula (1),

[0030]

[0031] In some embodiments, the adaptive tension control method comprises the following steps:

[0032] S1: collecting the current roll diameter D2 (mm) of the material wheel (4) in real time through a second laser distance measuring sensor; S2: when D2 is less than 200 mm, determining the braking torque T (N·m) according to a first preset rule, wherein the first preset rule ensures that T increases as D2 increases, and when D2 is within the range of 100 mm to 180 mm, the value range of T is 1.0 N·m to 6.0 N·m;

[0033] When D2 ≥ 200 mm, the braking torque T is determined according to a second preset rule, which is: Where K is the proportional coefficient, unit is %.N, and K decreases as D2 decreases.

[0034] In some embodiments, the anti-deformation cart further comprises:

[0035] a first gear disc, wherein the first gear disc is mounted on the first transmission shaft;

[0036] a second sprocket, the second sprocket being mounted on the second transmission shaft, the first sprocket and the second sprocket being both arranged on the front side or the rear side of the frame;

[0037] A first self-locking assembly, wherein the first self-locking assembly has a self-locking position for locking the first toothed disc and an unlocking position for releasing the lock from the first toothed disc;

[0038] and a second self-locking component, wherein the second self-locking component has a self-locking position for locking the second sprocket and an unlocking position for releasing the lock from the second sprocket; the first self-locking component and the second self-locking component both include a push rod, an engaging head and an elastic reset member, the push rod being vertically arranged on the frame and being able to move vertically relative to the frame, the engaging head being arranged at the top of the push rod, the engaging head being suitable for engaging and locking with the first sprocket and the second sprocket to limit the rotation of the first transmission shaft and the second transmission shaft, the elastic reset member being arranged between the push rod and the frame to provide reset power for resetting the push rod; a connecting rod, the connecting rod connecting the push rods of the first self-locking component and the second self-locking component; at least one driving motor, which is used to drive the push rods of the first self-locking component and the second self-locking component to move vertically relative to the frame, thereby driving the first self-locking component and the second self-locking component to switch between the self-locking position and the unlocking position.

[0039] In some embodiments, the intelligent deflection device includes: an automatic code scanning device, which is arranged on the deflection frame, and automatically scans the tire production barcode bound to the FID chip of the trolley when the trolley is in place for reverse tracing.

[0040] In some embodiments, the working air pressure of the air-encapsulating capsule chuck is 0.6-0.8 MPa.

[0041] In some embodiments, the PLC controller is further configured to perform synchronous control: real-time calculation of the material wheel feeding linear speed V1 and the pad wheel pad winding linear speed V2; dynamic adjustment of the magnetic powder brake braking torque and the drive motor speed so that V1 = V2 = α.

[0042] In some embodiments, the meshing head is fully engaged with the tooth groove of the toothed disc in the self-locking position and is completely separated in the unlocking position, and the rotation angle of the spool in the locked state is ≤1°

[0043] The present invention further provides a constant linear velocity control method, which comprises the following steps:

[0044] S1: collecting the current roll diameter D1 of the cloth pad wheel (5) in real time through a first laser distance measuring sensor;

[0045] S2: preset target linear velocity α (mm / s);

[0046] S3: When the pad rubber is used to conduct the output frequency A (hz) of the drive motor inverter, the corresponding speed is B (rpm). A reduction mechanism is provided between the drive motor and the second transmission shaft (3), and the reduction ratio thereof is C.

[0047] Rated speed is

[0048] After deceleration by the mechanism: That is, when the output frequency of the inverter is Ah, the speed of the cloth wheel (5) is:

[0049] S4: Circumferential velocity of the cloth wheel (5) corresponding to the target linear velocity α (mm / s), Y is the angular velocity of the cloth wheel (5) (deg / s)

[0050]

[0051] but

[0052] x is the frequency (hz) that the inverter needs to output, and Z is the speed (r / s) corresponding to the changing coil diameter at the linear speed of C (mm / s).

[0053]

[0054] because As shown in formula (1),

[0055]

[0056] The intelligent pad rubber feeding control system provided by the present invention solves the existing problems of pad rubber deformation and difficulty in material replacement, and also promotes intelligent tire manufacturing and automated production. Pad rubber material deformation seriously affects tire blank production quality and easily produces unqualified tires. Poor feeding can easily lead to discounts and other problems, making operation difficult and requiring a lot of manual intervention. The present invention aims to significantly improve the quality of rolled pad rubber, reduce the production of unqualified tires within the standard range, and make the replacement of rolled pad rubber more convenient and promote intelligent tire production processes. This type of forming machine pad rubber intelligent feeding control system includes an automated pad rubber roll material trolley and an intelligent pad rubber feeding system. The pad rubber SDS (Sidewall Defect System) pass rate is increased from 98.87% to 100%, and the incidence of pad rubber shoulder bubble and tire inner layer delamination problems is about 0.12%. After using the new tooling, the pad rubber shoulder bubble and tire inner layer delamination problems are reduced by 30%.

[0057] The intelligent rubber pad feeding control system of the present invention realizes differentiated control of the unwinding speed for the first time: the driving motor speed is adjusted in real time through constant linear speed control to ensure that the feeding linear speed is constant when the pad cloth wheel unwinds the rubber pad cloth, solving the rubber stretching / accumulation problem caused by the change of the roll diameter in the traditional system; at the same time, adaptive tension control is used to dynamically adjust the braking torque of the magnetic powder brake according to the real-time roll diameter of the rubber pad cloth roll on the material wheel to maintain the optimal winding tension, and realize the coordinated balance of the two through PLC closed-loop control. Constant linear speed control ensures the stability of rubber material transportation, and adaptive tension control maintains the forming quality of the rubber pad cloth roll, finally achieving the full process of damage-free unwinding of rubber, protection of triangular cross-section, non-slip winding of pad cloth, and maintenance of interlayer structure. It breaks through the technical limitations of the traditional system that treats two roll diameters equally, and provides key support for intelligent tire manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic structural diagram of the trolley provided by the present invention;

[0059] Figure 2 This is a schematic structural diagram of the trolley (with a cloth pad) provided by the present invention;

[0060] Figure 3 This is a schematic diagram of the actual working state of the trolley before improvement and the winding trolley provided by the present invention;

[0061] Figure 4 Schematic diagram of the surface appearance of the pad rubber before and after improvement;

[0062] Figure 5 Schematic diagram of the appearance of the triangular cross section of the rubber pad before and after improvement;

[0063] Figure 6 The following are the SDS test results of the tire cushion rubber before and after improvement. DETAILED DESCRIPTION

[0064] See also Figure 1An embodiment of the present invention provides an intelligent rubber pad feeding control system, comprising an anti-deformation trolley and an intelligent deflection device; the anti-deformation trolley comprises a frame 1, a first transmission shaft 2 and a second transmission shaft 3 arranged parallel to the frame, a material wheel 4 mounted on the first transmission shaft 2 and a cloth pad wheel 5 mounted on the second transmission shaft 3, the ends of the first transmission shaft 2 and the second transmission shaft 3 being connected to a first chuck 6 and a second chuck 7 arranged in the same direction; the first transmission shaft 2 is taller than the second transmission shaft 3. Due to the excessive flexibility of the rubber pad in this embodiment, the trolley further comprises a plurality of passive guide rollers 71, 72, 73, and 74, which are mounted parallel to each other on the frame from front to back and are located in the same horizontal mounting plane. After the rubber pad cloth deflected from the material wheel 4 passes through the plurality of parallel guide rollers 71, 72, 73, and 74 for smooth transitional transport, the rubber pad is conveyed toward the feeding end directly in front, and the deflected cloth pad is guided onto the cloth pad wheel for winding. The design utilizes a high-low dual drive shaft layout, coupled with multiple passive guide rollers, to create a material flow path with low-level deflection, horizontal conveying, and high-level winding, effectively preventing rubber folding and squeezing. Compared to existing trolleys (such as the winding trolley disclosed in CN114735508B, which is primarily suitable for hard rubber pads), the fully coplanar guide rollers ensure smooth steering of the pad while completely eliminating the folding risk and tensile stress caused by the traditional triangular layout on highly flexible rubber pads. This makes it particularly suitable for the processing needs of ultra-soft rubber pads for new energy vehicles.

[0065] Further, see Figure 2 The upper surface of the pad cloth 8 provided by the present invention is provided with a plurality of sponge ridges 81 at intervals. The sponge ridges 81 extend along the length direction of the pad body 8. The sponge ridges 81 are evenly arranged along the longitudinal direction of the pad cloth 8, forming an elastic buffer space between layers, which not only avoids the rigid squeezing of the rubber material by the traditional steel plate pad cloth, but also overcomes the defect of insufficient support of soft materials. This structure can adapt to the deformation of the rubber pad, continuously provide flexible support during the winding and unwinding process, and ensure the integrity of the cross-sectional shape of the rubber material. Compared with metal pad cloths, the sponge material greatly reduces weight and is more in line with the characteristics of the rubber material, protecting the shape of the rubber pad; in addition, the sponge can be compressed and rebounded, automatically adapting to the thickness fluctuation of the rubber pad. It is preferably an open-pore polyurethane sponge. The open-pore structure allows air to circulate freely, which not only avoids the unstable support caused by the closed-pore sponge, but also prevents the rubber pad from sticking to the pad cloth.

[0066] The intelligent deflection device includes a deflection frame, an inlet and outlet chain mounted on the deflection frame for pulling the trolley into position, a drive motor, a magnetic powder brake, a first laser ranging sensor and a second laser ranging sensor for detecting the winding diameters of the pad wheel and the material wheel, and a PLC controller. The drive motor and the magnetic powder brake are respectively connected to the second chuck 7 and the first chuck 6 of the trolley through an air-holding capsule chuck. The magnetic powder brake uses magnetic powder as a medium and forms a magnetic powder chain when powered to transmit torque. It is a new type of transmission element, mainly composed of an inner rotor, an outer rotor, an excitation coil, and magnetic powder.

[0067] The PLC controller is configured to perform the following closed-loop control:

[0068] (a) Constant Linear Speed Control Method: Based on the set feed line speed α and the real-time roll diameter D1 of the cloth wheel, as measured by the first laser ranging sensor, the output frequency f of the drive motor is dynamically adjusted to control the linear speed of the cloth wheel. (b) Adaptive Tension Control Method: Based on the real-time roll diameter D2 of the material wheel, as measured by the second laser ranging sensor, the braking torque command required by the magnetic powder brake is dynamically calculated and output to adjust the linear speed of the material wheel. The closed-loop control system of the intelligent unwinding device of this invention achieves precise material conveying management through an innovative control architecture. The linear speed control module dynamically adjusts the drive motor speed by monitoring the changes in the roll diameter of the cloth wheel in real time to ensure a constant unwinding speed. This solves the problem of rubber stretching or accumulation caused by roll diameter changes in traditional systems and maintains feeding stability. The adaptive tension control module automatically adjusts the braking torque based on the changes in the roll diameter of the material wheel, ensuring that the rubber cloth maintains optimal tension at all times. This dynamic adjustment avoids quality issues caused by overly tight or loose rubber padding. The two control modules interact with each other in real time, forming a collaborative working mechanism. When the system detects a change in the winding diameter of any spool, it synchronously adjusts the drive and braking parameters to maintain the dynamic balance of the entire system. This design achieves intelligent synergy between the two. Through precise speed-tension matching, it protects the integrity of the rubber compound and ensures smooth winding of the mat.

[0069] Specifically, to achieve continuous feeding of rubber pads, the material feeding line speed at the feeding point must be equal to the transmission line speed of the rubber pad feeding rack conveyor belt. The material roll diameter changes with the change in the material roll, and the pad cloth rewinding and material feeding are carried out synchronously. As the material roll diameter changes from large to small, the line speed changes from fast to slow. As the pad cloth rewinding roll diameter changes from small to large, the line speed changes from slow to fast. The material feeding line speed at the feeding point must always be equal to the transmission line speed y (mm / s) of the rubber pad feeding rack conveyor belt to achieve continuous feeding. The pad cloth rewinding drive motor needs to implement variable speed control. The material roll distance sensor and the pad cloth roll distance sensor measure the actual roll diameter gmm. The material roll feeding drive motor calculates the angular velocity of the variable speed drive based on the measured material roll diameter and the pad cloth roll diameter. The magnetic powder brake calculates the output damping value based on the measured material roll diameter and the pad cloth roll diameter. The effect achieved is smooth material feeding without pulling or deformation.

[0070] In some embodiments of the present invention, the constant linear speed control method specifically includes the following steps: S1: collecting the current winding diameter D1 of the cloth pad wheel 5 in real time by a first laser ranging sensor;

[0071] S2: preset target linear velocity α (mm / s);

[0072] S3: When the pad rubber is released and the output frequency of the drive motor inverter is A (hz), the corresponding speed is B (rpm). A reduction mechanism is provided between the drive motor and the second transmission shaft 3, and its reduction ratio is C;

[0073] Rated speed is

[0074] After deceleration by the mechanism: That is, when the output frequency of the inverter is Ah, the speed of the cloth wheel 5 is:

[0075] S4: Circumferential velocity of the cloth wheel 5 corresponding to the target linear velocity α (mm / s), Y is the angular velocity of the cloth wheel 5 (deg / s)

[0076]

[0077] but

[0078] x is the frequency (hz) that the inverter needs to output, and Z is the speed (r / s) corresponding to the changing diameter of the cloth wheel 5 at the linear speed of C (mm / s).

[0079]

[0080] because As shown in formula (1),

[0081]

[0082] Taking the actual test case of Zhongce Qingquan as an example, the speed of the Zhongce Qingquan pad rubber guide drive motor inverter output 50Hz is 1455rpm.

[0083] The reduction ratio is about 46, and the linear speed is required to be stable at 150mm / s.

[0084] Rated speed is

[0085] After deceleration: That is, the speed of the first transmission shaft is 0.53r / s at 50Hz

[0086] Let Y be the angular velocity (deg / s) corresponding to the linear velocity (mm / s)

[0087]

[0088] but

[0089] Let x be the angular velocity (deg / s) when maintaining a stable linear velocity, and the frequency (hz) required to be output by the inverter.

[0090] Z is the speed corresponding to the changing diameter of the cloth wheel 5 at a linear speed of 150 (mm / s), and the proportional formula is obtained:

[0091]

[0092] From this, we can get:

[0093]

[0094] because As shown in formula (1), Substitute the data Z value and Y value to get;

[0095]

[0096] We can derive the relationship between the frequency and the stable linear speed that the inverter of the drive motor needs to output:

[0097]

[0098] In some embodiments, the adaptive tension control method comprises the following steps:

[0099] S1: The current roll diameter D2 (mm) of the material wheel 4 is collected in real time through the second laser ranging sensor;

[0100] S2: Calculate the braking torque T (N·m) of the magnetic powder brake. The following is an example of the braking torque T and the coil diameter:

[0101]

[0102]

[0103] Specifically, when D2<200 mm, the winding diameter-torque mapping relationship is:

[0104] When D2 = 100 mm, T = 1.0 N m;

[0105] When D2 = 150 mm, T = 3.0 N m;

[0106] When D2 = 180 mm, T = 6.0 N m;

[0107] If D2>200mm, K is the proportionality coefficient (%.N).

[0108] As disclosed in CN114735508B, the winding trolley further comprises a first sprocket, which is mounted on the first transmission shaft; a second sprocket, which is mounted on the second transmission shaft, and the first and second sprockets are both arranged on the front or rear side of the frame; a first self-locking component, which has a function of locking the first sprocket and a second self-locking component, and the second self-locking component has a self-locking position for locking the second sprocket and an unlocking position for releasing the lock from the second sprocket; the first self-locking component and the second self-locking component both comprise a push rod, an engaging head and an elastic reset member, and the push rod is vertically arranged The cam is mounted on the frame and can move vertically relative to the frame, the engaging head is arranged on the top of the push rod, the engaging head is suitable for engaging and locking with the first sprocket and the second sprocket to limit the rotation of the first transmission shaft and the second transmission shaft, and the elastic reset member is arranged between the push rod and the frame to provide reset power for resetting the push rod; a connecting rod, the connecting rod connects the push rod of the first self-locking component and the second self-locking component; at least one driving motor, which is used to drive the push rods of the first self-locking component and the second self-locking component to move vertically relative to the frame, thereby driving the first self-locking component and the second self-locking component to switch between the self-locking position and the unlocking position.

[0109] In this embodiment, the intelligent deflection device includes: an automatic code scanning device, which is arranged on the deflection frame. When the trolley arrives at the position, it automatically scans the trolley FID chip and binds it to the tire production barcode for reverse tracing.

[0110] The working pressure of the air-holding capsule chuck is 0.6-0.8MPa.

[0111] The diameter of the material wheel 4 is in the range of 200-1200 mm, and the diameter of the cloth wheel 5 is in the range of 200-1200 mm.

[0112] In some embodiments, the PLC controller is further configured to perform synchronous control: real-time calculation of the feeding linear speed V1 of the material wheel 4 and the padding wheel 5 padding winding linear speed V2; dynamic adjustment of the driving motor speed and the braking torque of the magnetic powder brake so that V1 = V2 = α.

[0113] In some embodiments, the meshing head is completely engaged with the tooth groove of the toothed disc in the self-locking position and completely separated in the unlocking position, and the rotation angle of the spool in the locked state is ≤1°.

[0114] Optionally, the first laser ranging sensor and the second laser ranging sensor calculate the distance by measuring the laser round-trip time difference / phase difference, and deduce the coil diameter.

[0115] The present invention replaces the original winding trolley with the winding trolley in the embodiment of the present invention (see Figure 2 ),

[0116] See also Figure 4 From the appearance comparison, we can see that before the improvement, the cushion rubber surface color was uneven, the rubber material distribution was uneven, the appearance quality was poor, and it was easy to cause subsequent fitting problems. After the improvement (right picture): the cushion rubber surface color is uniform, smooth and flat, with clear and coherent texture, indicating that the rubber material distribution and tension control in production are more precise, ensuring the quality of tire molding.

[0117] See also Figure 5 , can be seen from the tire cross section, from the handheld rubber cross section, the triangular outline is obviously deformed, the sides are irregular, and the angles are abnormal. After the improvement, the cross section of the rubber on the equipment has a clear triangular outline, straight sides, and precise angles. The tire sidewall rubber is tested for SDS items, and the rubber deformation of the 1st, 10th, and 20th circles of the rubber before and after the improvement is sampled. The rubber passes through the intelligent rubber device, please refer to Figure 6 The deformation of the guide pad rubber is significantly reduced. The subsequent tracking of the qualified rate of tire quality SDS items is increased from 98.87% to 100%. The incidence rate of pad rubber shoulder bubble problem items and tire inner layer delamination problem items is about 0.12%. After using the new tooling, the pad rubber shoulder bubble and tire inner layer delamination are reduced by 30%, which can reduce 889 shoulder bubbles and tire inner layer delamination / year, and generate benefits: 889 pieces / year × 840 yuan / piece = 746,760 yuan / year.

[0118] The intelligent padding rubber feeding control system provided by the present invention solves the existing problems of padding rubber deformation and difficulty in material replacement, and also promotes intelligent tire manufacturing and automated production. Padding rubber material deformation seriously affects tire blank production quality and easily produces substandard tires. Poor feeding can easily lead to buckling and other problems, making operation difficult and requiring a lot of manual intervention. The present invention aims to significantly improve the quality of padding rubber rolls, reduce the number of substandard tires within the standard range, and make padding rubber replacement more convenient, promoting intelligent tire production processes. This intelligent padding rubber feeding control system for forming machines includes an automated padding rubber roll material cart and an intelligent padding rubber feeding system. This system achieves an improvement in the padding SDS pass rate to 99.5%, a 15% reduction in shoulder bubbles and tire delamination, and automated, uninterrupted padding feed.

Claims

1. An intelligent rubber feeding control system, characterized in that: It includes an anti-deformation trolley and an intelligent deflection device; the anti-deformation trolley includes: Frame (1); A first transmission shaft (2) and a second transmission shaft (3) are arranged in parallel on the vehicle frame, and the first transmission shaft (2) is taller than the second transmission shaft (3); A material wheel (4) is mounted on the first transmission shaft (2) and a cloth wheel (5) is mounted on the second transmission shaft (3); ends of the first transmission shaft (2) and the second transmission shaft (3) are connected to a first chuck (6) and a second chuck (7) arranged in the same direction; The intelligent deflection device comprises: Lead away the frame; The in-and-out chains installed on the frame are used to pull the trolley into place; The driving motor and the brake are respectively connected to the second chuck and the first chuck of the trolley; A first laser distance measuring sensor and a second laser distance measuring sensor for detecting the roll diameters of the cloth pad wheel and the material wheel; The PLC controller is configured to perform the following closed-loop control: (a) Constant linear speed control method: Based on the set feeding linear speed α and the real-time winding diameter D1 of the cloth pad wheel (5) collected by the first laser distance sensor, the output frequency f of the driving motor is dynamically adjusted: (b) Adaptive tension control method: dynamically calculate and output the braking torque instruction required by the brake according to the real-time winding diameter D2 of the material wheel (4) collected by the second laser ranging sensor.

2. The system according to claim 1, wherein: The constant linear velocity control method specifically comprises the following steps: S1: collecting the current roll diameter D1 of the cloth pad wheel in real time through the first laser distance measuring sensor (18); S2: preset target linear velocity α (mm / s); S3: When the pad rubber is used to conduct the output frequency A (hz) of the drive motor inverter, the corresponding speed is B (rpm). A reduction mechanism is provided between the drive motor and the second transmission shaft (3), and the reduction ratio thereof is C. Rated speed is After deceleration by the mechanism: That is, when the output frequency of the inverter is Ah, the speed of the cloth wheel (5) is: S4: Circumferential velocity of the cloth wheel (5) corresponding to the target linear velocity α (mm / s), Y is the angular velocity of the cloth wheel (5) (deg / s) but x is the frequency (hz) that the inverter needs to output, and Z is the speed (r / s) corresponding to the changing coil diameter at the linear speed of C (mm / s). because As can be obtained from formula (1), 3. The system according to claim 1, wherein: The adaptive tension control method comprises the following steps: S1: The current roll diameter D2 (mm) of the material wheel (4) is collected in real time by a second laser distance measuring sensor; S2: When D2 is less than 200 mm, the braking torque T (N·m) is determined according to a first preset rule. The first preset rule ensures that T increases with increasing D2, and when D2 is in the range of 100 mm to 180 mm, the value range of T is 1.0 N·m to 6.0 N·m. When D2 ≥ 200 mm, the braking torque T is determined according to a second preset rule, which is: Where K is the proportional coefficient, unit is %.N, and K decreases as D2 decreases.

4. The system according to claim 1, wherein the brake is a magnetic powder brake, and the drive motor is connected to the magnetic powder brake through an air-enclosed capsule chuck and a first chuck and a second chuck.

5. The system according to claim 1, wherein: The anti-deformation trolley further comprises: a first gear disc, wherein the first gear disc is mounted on the first transmission shaft; a second sprocket, the second sprocket being mounted on the second transmission shaft, the first sprocket and the second sprocket being both arranged on the front side or the rear side of the frame; A first self-locking assembly, wherein the first self-locking assembly has a self-locking position for locking the first toothed disc and an unlocking position for releasing the lock from the first toothed disc; and a second self-locking component, wherein the second self-locking component has a self-locking position for locking the second sprocket and an unlocking position for releasing the lock from the second sprocket; the first self-locking component and the second self-locking component both include a push rod, an engaging head and an elastic reset member, the push rod being vertically arranged on the frame and being able to move vertically relative to the frame, the engaging head being arranged at the top of the push rod, the engaging head being suitable for engaging and locking with the first sprocket and the second sprocket to limit the rotation of the first transmission shaft and the second transmission shaft, the elastic reset member being arranged between the push rod and the frame to provide reset power for resetting the push rod; a connecting rod, the connecting rod connecting the push rods of the first self-locking component and the second self-locking component; at least one driving motor, which is used to drive the push rods of the first self-locking component and the second self-locking component to move vertically relative to the frame, thereby driving the first self-locking component and the second self-locking component to switch between the self-locking position and the unlocking position.

6. The system according to claim 1, wherein: The intelligent deflection device includes: an automatic code scanning device, which is arranged on the deflection frame. When the trolley is in place, it automatically scans the trolley's FID chip and binds it to the tire production barcode for reverse tracing.

7. The system according to claim 1, wherein: The working air pressure of the air-encapsulating capsule chuck is 0.6-0.8 MPa.

8. The system according to claim 1, wherein: The PLC controller is also configured to perform synchronous control: real-time calculation of the feeding linear speed V1 of the material wheel (4) and the padding wheel (5) padding winding linear speed V2; dynamic adjustment of the magnetic powder brake braking torque and the driving motor speed so that V1 = V2 = α.

9. The system according to claim 1, wherein: The meshing head is completely engaged with the tooth groove of the toothed disc in the self-locking position and completely separated in the unlocking position, and the rotation angle of the spool in the locked state is ≤1°.

10. A constant linear velocity control method comprising the following steps: S1: collecting the current roll diameter D1 of the cloth pad wheel (5) in real time through the first laser distance measuring sensor (18); S2: preset target linear velocity α (mm / s); S3: When the pad rubber is used to conduct the output frequency A (hz) of the drive motor inverter, the corresponding speed is B (rpm). A reduction mechanism is provided between the drive motor and the second transmission shaft (3), and the reduction ratio thereof is C. Rated speed is After deceleration by the mechanism: That is, when the output frequency of the inverter is Ah, the speed of the cloth wheel (5) is: S4: Circumferential velocity of the cloth wheel (5) corresponding to the target linear velocity α (mm / s), Y is the angular velocity of the cloth wheel (5) (deg / s) but x is the frequency (hz) that the inverter needs to output, and Z is the speed (r / s) corresponding to the changing coil diameter at the linear speed of C (mm / s). because As shown in formula (1),

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